++
This book is dedicated to the physical therapy students over the years,
++
who have challenged us to keep it relevant;
++
the MS and PhD students, who have challenged us to keep it fresh;
++
our colleagues, who have helped us think more clearly;
++
our friends and families, who have allowed us the time and space to write;
++
and most especially, our patients
++
who have allowed us to see the miracle of the nervous system in action
++
as we helped guide their recovery.